Machine for making dowel-pins



4 Sheets-Sheet 1.

(No Model.)

H. H. ROCKWELL; MACHINE FOR MAKING DOWBL PINS.

Patented 001;. 13, 1896.

l lllw ilhbb (No Model.)

ROCKWELL.

MACHINE FOR MAKING DOW EL PINS.

Patented Oct. 13, 1896.

4 Sheets-Sheet 2.

(No Model.) 4 Sheets-Sheet 3; H. H. ROCKWELL.

MACHINE FOR MAKING DOWEL PINS. No. 569,234. Patented Oct. 13, 1896.

IHII

(No Model.) 4 Sheets-Sheet 4.

H. H. ROCKWELL.

MACHINE FOR MAKING DOWEL PINS.

No. 569,234. Patented Oct. 13, 1896.

HENRY H. ROCIUVELL, OF

PATENT OFFICE.

MILXVAUKEE, WISCONSIN.

MACHINE FOR MAKING DOWEL-PINS.

SPECIFICATION forming part of Letters Patent No. 569,234, dated October18, 1896.

Application filed April 13, 1893.

To (6 whom it may concern.-

Be it known that I, HENRY H. RooKWELL, of Milwaukee, in the county ofMilwaukee and State of Visconsin, have invented certain new and usefulImprovements in Machines for Making Dowel-Pins; and I do hereby declarethat the following is a full, clear, and exact description of theinvention,which will enable others skilled in the art to which itpertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

The main objects of my invention are to produce a wood dowel-pin whichmay be readily driven and which will retain sufficient glue distributedover its surface to hold it in place and to facilitate the production ofsuch dowelpins.

It consists, essentially, of the machine constructed and arranged toform such dowelpins, as hereinafter particularly described, and pointedout in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure 1 is a side elevation of a machine embodying my improvements.Fig. 2 is a plan view of the same, the upper feed-rollers and theirsupports being removed to disclose underlying parts. Fig. 3 is avertical crosssection of the machine on the line 3 3, Fig. 1. Fig. 4 isa cross section of a portion of the machine on the line 4 4, Fig. 1,showing a pair of feed-rollers and their adjusting and drivingconnections. Fig. 5 is a similar section on the line 5 5, Fig. 1,showing the groovingsaw and the upper tinting-cutter. Fig. 6 is ahorizontal section on the line 6 6, Fig. 1, showing a part of thedriving connections. Fig. 7 is a similar section on the line 7 7, Fig.1, showing the peculiar driving connection of the side tinting-cutters.Fig. 8 is a horizontal section on the line 8 8, Fig. 1. Fig. 9 is adetail view, on an enlarged scale,- of a portion of one of thetinting-cutters; and Fig. 10 is a detail View of a guiding-roller.

Referring to Figs. 1 and 2, A represents a turning-chuck orrounding-cut-ter,which consists of a sleeve a, provided at one end withknives a a, detachably secured thereto and Serial No. 470,285. (Nomodel.)

constructed an d arranged to reduce the square blanks from which thedowel-pins are made to cylindrical form. The sleeve a is provided with apulley a which is driven by a belt from a pulley b on the driving-shaftB, supported in suitable bearings in the lower part of the frame of themachine parallel with the axis of the rounding-cutter A; The end of thesleeve a, which is provided with knives, is preferably inclosed by asuitable housing.

0 is a fixed angular bed-plate, upon which the squared dowel-blanks arefed in proper position to the rounding-cutter. c is avertically-yielding angular presser-plate located above the bed-plate Cand arranged to bear upon the upper side of the blanks and hold themsnugly down upon said bed-plate.

D D are horizontal guiding and feeding rollers mounted upon the upperends of vertical shafts cl d on opposite sides of the axis of therounding-cutter adjacent to its end opposite the knives a and havingconcave peripheries adapted to the rounded dowelblanks, as shown inFigs. 1 and 3. The shafts d and d are supported at their upper ends inoutwardly-yielding bearings, as shown in Fig. 3, whereby the rollers Dand D are permitted to recede slightly from each other, and allowance ismade for slight variations in the size of the blanks. They are connectedat or near their lower ends by gears d 61 At its lower end the shaft dis provided with a bevelpinion 01 which meshes with a similar gear 6,mounted with a sprocket-wheel E, to which it is concentrically attached,upon a horizontal stud secured to the frame.

The sprocket-wheel E is connected by a chain belt with a sprocket-wheelF, mounted with a spur-gear f, to which it is concentrically attached,upon a parallel stud secured to the frame, as shown in Fig. 6. The gearf meshes with a gear 9 on a horizontal shaft Gr, parallel with thedriving-shaft B, and provided at the opposite end with a pulley g, whichis connected by a crossed belt, as shown in Fig. 1, with a pulley b onsaid drivingshaft. Through these connections the concave feed-rollers DD are rotated, as well as one of each of the pairs of feeding-rollershereinafter mentioned. A belt-tightening pulley g carried by a weightedlever g fulcrumed to the frame, serves when necessary to stop thefeeding mechanism while the cutters are in motion.

II is a vertical grooving-saw mounted on a horizontal arbor placedtransversely to and below the path of the blanks through the machine andsupported in a vertically-adjustable frame h, pivoted at one end to thebed of the machine and provided at the other end with a verticaladjusting-screw h, bearing upon said bed. The saw-arbor is provided witha pulley 7L2, which is connected by a belt with a pulley b on the maindrivingshaft.

I is a guiding-sleeve supported in the same axial line with therounding-cutter A and formed in its under side with a longitudinal slot,through which the upper edge of the saw II projects, as shown in Figs. 1and 5.

J is a rotary beading or fiuting cutter having concave serrated cuttingedges, as shown in detail in Fig. 9, and mounted upon a horizontal shaftj, above and transverse to the sleeve I, as shown in Fig. 2. The shaft jis carried by a vertically and horizontally adjustable frame j, and isprovided with a pulleyj which is connected by a belt passing over anidler b with a pulley b 011 the driving-shaft, as shown in Fig. l. Theframe j is fixed upon a rod j adj ustably held in bearings parallel withthe cutter-shaft j, and is provided on the opposite side of said rodfrom said shaft with an arm j, against which an adjusting-screwy,threaded in a fixed cross bar or plate, bears, as shown in Figs. 1, 2,and 5. Said frame is held rigidly in place when properly adjusted byset-screwsj j which are threaded in said cross bar or plate and clampthe box-caps tightly upon the ends of said rod j For vertical adjustmentit is swung upon the rod j by turning the screw 9' and it is adjustedhorizontally and transversely to the movement of the work by slippingsaid rod 7' endwise in its bearings, the screws j j" being firstloosened for either adjustment. The upper side of the sleeve I is cutaway, as shown in Fig. 1, to allow the cutter J to operate upon theblank held and guided therein.

Between the feeding-rollers D and D and the sleeve I are twovertically-disposed feeding-rollers K and K, mounted upon horizontalshafts 7t" and 7t, transverse to the path of the rounded blank, onebelow and the other above it, as shown in Fig. 4. The upperroller shaftis carried by a vertically-yielding pivoted frame k which permits theupper roller to recede from the opposing lower roller, thus allowing forvariations in the size of the blanks. The lower-roller shaft is isprovided with a bevel-gear 76, which meshes with a similar gear 15mounted with a spur-gear If, to which it is concentricallyattached upona vertical stud, as shown in Figs. 2 and 4. The gear 7; meshes with andis driven by a similar gear (1" on the vertical roller-shaft (Z.

J is a rotary beading or fiuting cutter constructed and mountedsimilarly to the cutter J upon a vertically and longitudinally ad justable horizontal shaft below and transverse to thepath of the blank.It is driven byapulley b on shaft 13. The blanks are supported in properposition for the operation of the cutter J by a sleeve 1, rigidlysupported in line with the sleeve I and cut away on the under side topermit of the operation of said cutter upon the blank.

L and L are like rotary beading or fiuting cutters mounted upon theupper ends of vertical shafts Z Z on opposite sides of the path of theblank in positions to operate thereon. Each of the shafts H is carriedby a vertically-ad j ustable horizontally-swinging frame Z which isfixed upon a vertical rod Z and is provided on the opposite side thereoffrom the cutter-shaft with an arm 1*, which is adj ustably held betweenopposing set-screws Z Z as shown in detail in Fig. 8. The rods Z uponwhich the frames Z are fixed, are capable of turning in their bearingsand rest at their lower ends upon adjusting-screws Z, by which thecutters may be raised and lowered. lVhen adjusted, they are rigidlysecured in place by set-screws Z 1 The cutter L operates upon the blankthrough a lateral opening in the sleeve I, which guides and holds itfirmly in place, and the cutter L operates through a lateral openingin aguiding-sleeve I in line with the sleeves I and I. The lower ends of theshafts Z and Z are provided with pulleys Z Z which are connected by abelt passing over idlers Z Z as shown in Figs. 1

and 7, with a pulley I) on the driving-shaft.

M M are concave guiding-rollers arranged between the sleeves l and I tohear one upon the under and the other upon the upper side of the blank.They are both supported by a vertically-adjustable slide m, to which ispivoted a vertically-yieldin g frame m, carrying the upper roller M, asshown in Fig. 1. The lower roller M is formed in its concaved periphery,as shown by Fig. 10, with a tongue m which enters the groove made by thesaw H and thus prevents the blank from turning.

N N and O O are two pairs of guiding and feeding rollers supported atthe delivery end of the machine on opposite sides of the path of theblank by horizontal shafts n n and o 0. The shafts n and 0 of the upperrollers are carried by vertically-yielding frames like the shaft of theupper feed-roller K, as shown in Fig. 4c. The shaft n is provided with asprocket-wheel 02 which is connected by a chain belt with a similarsprocket-wheel k on the shaft 7t, as shown in Fig. 2. It is alsoprovided with a spurgear p 5" which meshes with an idler n, in turn mcz'hing with a similar gear 0 on the shaft 0, as shown in Figs. 1 and 2,whereby the shaft 0 and its roller 0 are rotated in the proper directionby the shaft or. The shaft B is provided with tight and loose pulleys band 0 which are connected by a belt with a driving-pulley on asuitably-located counter-shaft. (Not shown.)

The operation of the machine will be readily understood by thosefamiliar with the art to which it pertains, from the foregoingdescription of its construction, without further explanation. It may benoted, however, that the stuff which is squared to the proper dimensionin cross-section for the operation of the machine may be of varyinglengths, and for this reason otherwise waste material may be worked upby the machine into dowel-pins.

I claim 1. In a machine for making dowel-pins, the combination of arotary rounding-cutter by which the blank is reduced to cylindrical formand a rotary tinting-cutter having concave serrated cutting edgesarranged to operate simultaneously 'upon the rounded blank and havingits axis substantially at right angles to the path of the blank but in adifferent plane, substantially as and for the purposes set forth.

2. In a machine for making dowel-pins, the combination of a rotaryrounding-cutter by which the blank is reduced to cylindrical form,rotary flirting-cutters having concave serrated edges arranged tooperate on opposite sides of the blank as it passes from said rounding-cutter,with their ares substantially at right angles to the blank andtheir peripheries presented thereto, and means of advancing the blanklengthwise and holding it from turning, substantially as and for thepurposes set forth.

3. In a machine for making dowel-pins, the combination of afluting-cutter having a concave serrated edge on its periphery, which ispresented to the blank, a grooving-saw adapted to form a continuouslongitudinal groove in the blank, the axes of said cutter and saw beingarranged substantially at right angles to the path of the blank andmeans of holding the blank from turning as it passes saidflirting-cutter and groovin g-saw, substantially as an d for thepurposes set forth.

at. In a machine for making dowel-pins, the combination of arounding-cutter, a rotary tinting-cutter having a concave serrated edge,a grooving-saw projecting normally at its periphery into the path of therounded blank, and means for holding the blank from turning as it passessaid tinting-cutter and grooving-saw, substantially as and for thepurposes set forth.

5. In a machine for making dowel-pins, the combination of four rotaryfluting-cutters having concave serrated edges arranged in opposing pairsto operate on opposite sides of the blank, a groovingsaw arranged tosimults" *ously cut a longitudinal groove therein and means of holdingthe blank from turning as it passes said fiuting-cutters andgrooving-saw, substantially as and for the purposes set forth.

G. In a machine for making dowel-pins, the combination of aguidingsleeve, a rotary flirting-cutter having a concave serrated edgeon its periphery which projects through an opening in the side of saidsleeve and mounted on a shaft substantially at right angles to the pathof the blank and means of moving the blank endwise through said sleeveand holding it from turning as it passes said fiutingcutter,substantially as and for the purposes set forth.

7. In a machine for making dowel-pins, the combination of a grooving-sawarranged to cut a continuous longitudinal groove in the blank and aguiding-roller having a concave periphery and a tongue adapted to enterthe groove made by said saw and thereby prevent the blank from turning,substantially as and for the purposes set forth.

8. In a machine for making dowel-pins, the combination of a grooving-sawarranged to cut a continuous longitudinal groove in the blank, rotarytinting-cutters having concave serrated cutting edges arranged tooperate simultaneously on opposite sides of the blank, andaguiding-rollerhavinga concave periphery and a tongue adapted to enterthe groove made by the saw and thereby prevent the blank from turning,substantially as and for the purposes set forth.

9. In a machine for making dowel-pins, the combination of a stationaryguiding-sleeve having a longitudinal slot in one side, a grooving sawprojecting at its periphery through said slot into said sleeve andhaving its axis substantially at right angles to the path of the blankand means of feeding a blank lengthwise through said sleeve and ofholding it from turning therein, substantially as and for the purposesset forth.

10. In a machine for making dowel-pins, the combination of opposingfeeding and guiding rollers having concave peripheries, rotaryflirting-cutters mounted on shafts substantially at right angles to thepath of the blank, with their peripheries presented thereto, and havingconcave serrated edges arranged to operate 011 opposite sides of theblank, one or more stationary guiding-sleeves having openings in thesides through which the fluting-cutters project and means of feeding ablank lengthwise through said sleeve or sleeves and of holding it fromturning therein, substantially as and for the purposes set forth.

11. In a machine for making dowel-pins, the combination of one or morepairs of concave feeding and guiding rollers arranged on opposite sidesof the path of the blank, one roller being capable of yielding away fromthe other, and a rotary flitting-cutter having a concave serrated edgemounted on a shaft transverse to the path of the blank and adj ustablctoward and from it, substantially as and for the purposes set forth.

12. In a machine for making dowel-pins, the combination of suitablefeeding and guiding devices and two sets of rotary fluting-cuttersmounted on shafts on opposite sides of and transverse to the path of theblank, the shafts of one set of cutters being approximately at rightangles to those of the other set, and the shafts of both sets beinglaterally and longitudinally adjustable, substantially as and for thepurposes set forth.

13. In a machine for making dowel-pins, the combination, of rotaryfiuting-cutters having concave serrated edges arranged on op positesides of the path of the blank and mounted upon shafts set substantiallyat right angles to and adjustable toward and from the path of the blank,stationary guiding-sleeves having openings in the sides through whichsaid cutters project and means offeeding a blank lengthwise through saidsleeves and of holding itfrom turning therein, substantially as and forthe purposes set forth.

14. In a machine for making dowel-pins, thecombination of a stationaryguiding-sleeve having a longitudinal slot in one side, a grooving-sawprojecting at its cutting edge through said slot into said sleeve, thesaw-arbor being set substantially at right angles to the path of theblank and adjustable toward and from the same and means of feeding ablank lengthwise through said sleeve and of holding it from turningtherein, substantially as and for the purposes set forth. I

15. In a machine for making fluted dowelpins, the combination with arotary roundingcutter, an angular guide or bed plate and an opposingyielding angular presser-plate, rotary fiuting-cutters arranged tooperate on opposite sides of the rounded blank, and a grooving-sawarranged to out a continuous longitudinal groove therein, substantiallyas and for the purposes set forth.

16. In a machine for making dowel-pins, the combination of means forforming a continuous dowel-rod of suit-able shape, a cutter for forminga longitudinal groove in said rod, and a holding device for engagingsaid groove, substantially as and for the purposes set forth.

17. In a machine for making dowel-pins, the combination of means forshaping a rod to a substantially circular outline with a longitudinaldepression from such outline, a roller having a concave periphery and aflange or tongue for engaging said depression, and feed mechanism forcausing the longitudinal passage of the rod, substantially as and forthe purposes set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

HENRY H. ROOIUVELL.

IVitn esses A. W. EMERY, CHAS. L. Goss.

